London’s Metropolitan Police did not immediately respond to a request for information about the incident, while parliamentary authorities said police were handling it.
The BBC cited police saying the incident was not terror-related.
In March last year, Khalid Masood, a British Muslim convert, rammed a car into pedestrians on Westminster Bridge before fatally stabbing a policeman on guard outside parliament.
The attack, which left five people dead and around 50 injured, ended only when police shot the 52-year-old Masood dead.
Article source: https://www.suchtv.pk/world/item/78556-armed-police-detain-man-outside-british-parliament.html